Wood heel jack



July 21, 1931. V w, HALL 1,815,734

' WOOD HEEL JACK Original Filed Jan/4, 1928 J5 Maze jazz 27a:

X WwM Patented July 21, 1931 UNITED; STA E I 'fWALTER H. HALL, OF WINCHENDON', MASSACHUSETTS,ASSIGNOR, BY.MES1\TE ASSIGN- MENTS, TO UNITED SHOE MACHINERY CORPORATION, OF BATERSON, NEW JERSEY,

A CORPORATION'OE NEW JERSEY -WOOD HEEL JACK Original application flied January 4.192aseria1 No. 244,530. Divided and this application filed Apri1 15,

1929. Serial 'This invention relates to a jack used for clamping wood heel blanks inposition forv I 'bod'ying my improvements; and

shaping in a wood heel molding machine and is a division of my prior application Serial No. 244,530, filed January 4, 1928 and granted on June 10, 1930as' Patent No. 7

1,762,296. I The object of the. invention-is to improve the constructionof jacks for the purpose stated and to provide an arrangement and combination of parts by which more effective operation maybe secured.

Important features ofthe invention relate 1 to improved means *for clamping the blank in the jack and for securelyretaining the parts in clamping position.

A- preferred form of the invention is shown in the drawings in which Fig. 1 is a sidev elevation of a jack em- 7 Fig. 2 is a similar View showing the parts in adifii'erent position. 1

Referring to the drawings, my improved jack comprises'aframe'member 10', secured to the upper end of a supporting shaft 111 V and the re-action of the pressure applied to p and having swinging -movement about the axis of said shaft. A heel blank support 12 v is pivoted at 13 to the stand The support 12' has a bearing portion 14 engaging a cam member 15 and raised or lowered thereby as the jack is swung about the axisv of the shaft 11.

A frame member 17 is secured to the sup port 12 and extends upward therefrom. The heel blank B rests on a serrated plate 20 on the support 12, and the upper surface of the heel .blank is engaged by a clamping bar 21 havinga cross pin or stud 22 loosely pivoted in a slot 23 in the frame member 17.

" A hand lever 25' is pivoted at 26 on a lever arm 27, which in turn is pivoted at 28 to the frame member 17 A cam roll 30 on the hand lever 25 engages the upper surface of the clamping bar 21 as the handle is swung downward and forces the clamping bar against the'upper surface of theheel blank B.

An adjusting screw 82 is threaded in the upper end of'the framemember 1'7 and acts as an adjustable abutment toli mit upward movement of the lever arm 27 The screw 32 thus constitutes means forcontrollingand placement of a molded blank, the hand lever 25 is in the raised position indicated in Fig.

1 and the pressure of the cam roll 30 on the clampingbar 21 is released. The finished heel blank B may thenbe removed and a new blank may beinserted in the jack and will be positioned by the stop '60 which engages an edge surface of the blank. I o. The hand lever 25 is then moved' downward to the positionindicated in Fig. 2, causing the roll 30 to apply rolling or cam pressure to the clamping bar 21 and to force the same downward into firm engagement with the heel blank. As the hand lever approaches its lower limit of travel, the roll 30 passes beyondthe line of a perpendicular from the pivot 26, to the upper surface of the arm 21,

the advantages thereof, I do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claims, butwhat I claim is':

1. In-a wood heel jack, a heel blank support having an upward extension, a clamp- 2 ing bar pivoted on said support extension, a hand lever, an arm for sa1d lever pivoted on sa1d support extenslon and to said lever, a

roll on said lever engaging said clamping bar, and means to adjust said lever arm relative to said support.

2. The combination in a wood heel jack as set forth in claim 1 in which the hand lever has a range of clampin movement sufiicient to carry said rolltoa loc g position beyond the line'of a perpendicular from the pivot of said hand lever to the roll-engaging surface of said arm.

3. In a Wood heel jack, a heelblank support having an upward extension, a clamping bar pivoted on said supportextension, a hand lever, an arm for said lever pivoted on V said support extension and tosaid lever, a roll on said lever engaging said clamping bar, and an adjusting screw for limiting-uplu Ward movement of said lever arm relative to said support. 7 p 4. In a Wood heel jack, a heel blank support having an ,npward extension, a clamping barp'ivoted on said support extension, a hand lever engaging said clamping bar, an arm for said lever pivoted on said support extension .andiato said lever, and .anadjusting screw. threaded in the fixed upper end of said support extensionand' adjustable therein tovary the clamping position of said bar. i

5.- Ina Wood heel jack, :a heel blank support having an upward extension, aelamping loar pivoted onsaid support extension, a hand lever engaging said clamping bar, an arm for said lever pivoted on said support extension andto said lever, and an adjust- 'ing screw for limiting uzpvvard'inovement of said-lever armrelative to said support, said 7 screw being mounted in the fixed upper end 39 of said support extension and directly engaging said arm. g testimony whereof I have hereunto aflixed'my signature.

- 7 WALTER H.

CERTZFICATE 0F CURRECTION.

Patent No. 1,815, 734. Granted July 21, 1931;, to

WALTER H. HALL.

it is hereby certified that the above numbered patent was erroneously issued to "United Shoe Machinery Corporation, of Paterson, New Jersey", whereas said patent should have been issued to Goodspoed Machine Company, of Winchendon, Massachusetts, a corporation of Massachusetts. said corporation being assignee of the entire interest in said invention, as shown by the records of assignments in this office; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 22nd day of September, A. D. 1931.

M. J. Moore, (Seal) Acting Commissioner of Eatents. 

